Shutter-support for gas-burners.



H. C. WEISKITTEL.

SHUTTER SUPPORT FOR GAS BURNERS.

APPLICATION FILED APR.21, I915.

1,143,469., Patented June 15, 1915.

Cir

HARRY c. wnrsmr'rnn, or BALTIMORE, MARYLAND.

SHUTTER-SUPPORT F OR GAS-BURNERS.

Application filed April 21,

To all whom it may concern:

Be it known that I, HARRY C. W'E'IsKrr- TEL, a citizen of the United States, residing at Baltimore, in the State of Maryland, have invented certainnew and useful Improvements in Shutter-Supports for Gas- Burners, of which the followingis a description, reference being had to the accompanying drawing and t0 the figures of reference marked thereon.

The invention relates to new and useful improvements in shutter supports for gas burners, and more particularly to a support which permits the shutter to be adjusted for varying or regulating the supply of air to the burner.

An object of the invention is to provide a shutter support which permits relatively small adjustments of the shutter, so that the supply of air to the burner may be regu lated to more closely approximate the proper proportioning of the air to the supply of gas. 7

In the drawings, Figure 1 is a view partly in side elevation and partly in section, showing a gas burner having my improvement applied thereto; Fig. 2 is a perspective view of the shank end of the burner, showing the adjusting means for the shutter; Fig. 3 is an end view, showing one position of the shutter; Fig. 4 is a view similar to Fig. 3, showing another position of the shutter; and Fig. 5 is an end view of the shank of the burner with the shutter removed.

In the drawings, I have shown a gas burner which consists of an inlet shank 2 and a burner 3 provided with the usual openings 4, through which the gases to be ignited pass.

The gas is supplied to this burner through a pipe 5. The shank of the burner is partially closed, leaving air openings 6 and 7. These air openings 6 and 7 are controlled by a shutter 8. The shutter 8 is in the form of a disk having openings 9 and 10, which coiiperate with the air openings 6 and 7 re spectively, in the shank of the burner. The burner with the fuel and air supply is of the well known construction and further description thereof is not thought necessary.

The shutter 8 has a flange 11 which pro jects over the outer edge of the shank of the burner. Said shutter is also provided with a series of openings 12. These open- Specification of Letters Patent.

Patented June 15,1915.

1915. Serial No. 22,949.

ings are, as shown in the drawings, round and are completely separated from each other. The openings are also equally spaced apart. The closed end of the shank of the burner is provided with a threaded recess 13, into which is adapted to be threaded a bolt 14. This threaded bolt 14 passes through one of the openings 12 and not only serves to secure the shutter to the shank of the burner but holds the shutter from turning on the shank of the burner so as to fix the size of the opening throughwhich the air passes to the burner. It will be understood that the openings 9 and 10 are so positioned in thershutter, relative to the openings 12, that, by putting the bolt in first one opening and then another, the shutter partially covers the openings 6 and 7 in the head of the burner and thus varies the size of these openings and the amount of air supplied to the burner. It will be readily seen that when one opening 13 is provided, the adjustment of the shutter will necessarily be the distance from the center of one hole to the center of the next adjacent hole. In order that there may be intermediate adjustments of the shutter, I have provided the head of the burner with a second threaded recess 15. The distance between the center of the recesses 13 and 15 is different from the distance between the center of adjacent openings in the shutter. As herein shown, the distance between the .center of the recesses 13 and 15 is one and one-half times the distance between the center of adjacent openings.

Let us assume that the shutter is in the position shown in Fig. 3 of the drawings, with the threaded bolt passing through the opening a in the shutter into the recess 13. The bolt may be withdrawn from this opening and the shutter turned in a clockwise direction until the opening I) registers with the recess 15 and the threaded bolt then inserted in the recess 15, as clearly shown in Fig. 4. The shutter will, therefore, be shifted or adjusted one-half the distance between the centers of adjacent openings in the shutter. It will be apparent that, by placing the threaded bolt first in one recess and then another and in successive openings in the shutter, the shutter may be adjusted step by step half the distance between the cen ters of the openings and when the threaded bolt is inserted in the opening the shutter will be locked from further adjustment and firmly held in place. By this difierential arrangement of the openings in the head of the burner, relative to the openings in the shutter, I. am able with a single holding bolt to provide a construction of shutter wherein the holes or openings in the shutter are entirely separated from each other and yet secure an adjustment of the shutter which is less than the distance between the centers of adjacent holes, and am thereby able to regulate the size of the openings through which air is admitted to the burner, so that the amount of air supplied may more nearly conform to the proper proportions to the amount of gas supplied under the conditions where the burner is used.

While I have shown two openings in the head of the burner, and a series of openings in the shutter, it will be apparent that from certain aspects of the invention, a series of openings may be made in the head of the burner and two openings made in the shutter having the relative arrangement as to centers above described and the same result accomplished. It will also be obvious that by having more than two openings in the head of the burner, which recesses are differently spaced, I may further divide the step adjustment of the shutter and thereby secure an even better regulation of the amount of air furnished to the burner. An essential feature of my invention, therefore, is the differential arrangement of recesses-in the head of the burner relative to the openings in the shutter which permit adjustments of the shutter distances less than the distance between the center of the openings. IVhile I have described my invention as applied to a shutter having separated openings, it will be apparent that this differential spacing of other.

Having thus described invention, what I claim as new and desire to secure by Let ters Patent, is:

1. A gas burner having a gas inlet shank provided with an air inlet opening, an adjustable shutter for regulating the size of said air inlet opening, said'shutter having a series of openings therein, said burner shank having a series of recesses formed therein, and means adapted to register with one of said openings and one of said recesses for locking said shutter in adjusted position, said recesses and openings having a differed tial arrangement relative to each other.

2. A gas burner having a gas inlet shank provided with an air inlet opening, an adjustable shutter for regulating the size of said air inlet opening, said. shutter having spaced separated openings, said shank having spaced threaded recesses, a bolt adapted to register with an opening in the shutter and to engage one of said threaded recesses, said threaded recesses in the shank of the burner and said openings in the shutter having a differential arrangement relative to each other, whereby said shutter may be adjusted distances less than the distance between the center of adjacent openings.

In testimony whereof, I afiix my signature, in the presence of two witnesses.

HARRY O. WEISKITTEL.

Witnesses ANTHONY C. ATHMANN, JOI-IND. HEISE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

